Fig. 2.31 Structure and development of endozooidal ovicells in: ( A – C ,
E – H ) Chartella membranaceotruncata ; ( D ) Gregarinidra serrata . ( A , C )
Areas of non-cleaned colonies with ovicells ( A wet specimen, C air-dried
specimen). ( B ) Mature non-cleaned ovicell, showing the operculum of
the maternal zooid and a collapsed ooecial vesicle. ( D ) Early stages of
ovicellogenesis. ( E – H ) Stages of ovicell formation. Abbreviations: dz
distal zooid, mz maternal zooid, oе ooecium, op operculum, v ooecial
vesicle. Scale bars: A , 1 mm; B , D – H , 100 μm; c , 300 μm